In this question you will be assessed on using good English, organising information clearly and using specialist terms where appropriate. A student has to check if two samples of hydrochloric acid, A and B, are the same concentration. Describe how the student could use the apparatus and the solutions in the diagram below to carry out titrations. – 6146

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1. Use a pipette to measure the alkali and put it into a conical flask.

   Add a few drops of indicator to the flask.

   Place the flask on a white tile to see the colour change clearly.

   Fill the burette with acid and record the starting volume.

   Slowly add acid to the flask while swirling it gently.

   Stop when the indicator changes colour, then record the burette volume used.

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